(mapcar '+ '(2) '(7))
(mapcar '+ '(2 3) '(7))
(mapcar '+ '(2 3 4) '(7 8 9))
(mapcar '+ '(2 3 4 5) '(7 8 9 10))
(mapcar '+ '(2 3) '(7 8 9 10))
(mapcar '+ '(2 3 4 5) '(7))
(mapcar '+ '(2 3 4 5) '(7 8))
(mapcar '+ '() '())
(mapcar '- '(2 3 4) '(9 8 7))
(mapcar '* '(2 3 4) '(9 8 7))
; mapcar uses shorter of lists to determine how many times to apply *
(mapcar '* '(2 3) '(9 8 7))
